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Published on 8/9/2017

Published by timharrison0064@gmail.com

Talk to me about concrete and steel accessories

What accessories are used in the standard concrete slab? And where do I buy them from?


 

Talk to me about concrete and steel accessories

What accessories are used in the standard concrete slab?  And where do I buy them from?

 

Mesh, bar and steel reinforcing accessories

 

Let's look at mesh, bar and reinforcing accessories first. They are utilised within your slab to increase the flexural strength of your slab. In other words to strengthen your slab by increasing its tensile strength and minimising the chance of it cracking down the track.

 

    

 

By dividing the square metre area in your concrete slab by the figure of 12.2 you can ascertain how many sheets of mesh you require. People do like to add 10% to reo and concrete quantities to allow for variabilities on site. The size of the ligatures required, e.g., 6mm or 9mm depends on what is traversing over the slabs when complete i.e., foot traffic, SL62 mesh, or trucks, SL92 mesh

Reinforced bar is defined as a steel bar or mesh of steel wires and is used as a tension device in reinforced concrete and reinforced masonry structures to strengthen and hold the concrete in tension. Rebar as it is referred is sold in cut and bent form, or most commonly by retailers and sellers in 6 metre lengths with the most popular being N12 and N16 gauge sizes utilised for house and shed slab construction

Plastic bar chairs are the concrete and reo accessories used to set the reinforcing bar and mesh to the correct position within the concrete cover. Concrete slabs are most commonly 100mm (4 inches) thick with the plastic bar chair size of 50/65 being recommended for these slabs. Bar chairs come in bags of 100 and you utilise approximately 18 bar chairs per sheet of mesh.

Bar chairs come in all shapes and sizes depending on the heaight of your slab and they can be manufactured out of steel or even concrete where required.

Tying steel and reinforcing is a task that takes time and proficiency. Steel needs to sit at an appropriate level above the slab sub base to ensure there is enough cover for the concrete to flow above and below it, in order to ensure the use of steel reinforcing is maximised. The flexural strength and tensility of the slab are increased when the steel is tied and fixed. Tie wire is the accessory utillised to tie steel, mesh and bar in place on site

Bag ties, the wire ties and loops can be utilised in the tying of reinforced bar and mesh. Many DIY and weekend concreters prefer bagties to tie wire as they come in bundles of pre cut pieces with loops at either end. 

 

Formwork and accessories

Now lets consider form work. Whilst expensive for a "one off" slab unlike mesh, bar and steel reinforcing accessories formork and formwork accessories can be stripped from your slab and used again in other slabs or other applications.

 

 

Formboards are used in concrete projects to keep the concrete in place during pouring when the concrete is in its plastic, or wet state. Form boards are often timber and range from 100 mm boards to 240mm

Concrete pegs are utilised in formwork in the concrete and associated industries to secure wooden form boards, reinforced steel and other structural materials on site. The pegs are sold as either wooden pegs or steel pegs, and can often be found with yellow safety caps on the top to protect personnel from cuts and abrasions on site


 
Plastic and Tape accessories

Plastic is used to prevent moisture from penetrating the concrete in a slab from within the ground or sub base. Usually supplied in rolls that are 50 metres in length, 4 metres in width, plastic is more often than not black or orange in colour.

Tape or PVC tape as it is referred is a reo or concrete accessory that is utilised throughout the concrete and steel reinforcing industries. PVC tape is delivered in small roles and utilised to tape together plastic on the sub base of slabs to ensure water, moisture and contaminent's do not make their way into the freshly poured concrete. 

 

Control joints and accessories to minimise cracking

When under load or pressure concrete can crack as and where it wants to. By minimising the size of your slab through the insertion of joints within your concrete you control cracking as the concrete is less susceptible to cracking where it wants to when in its hardened state. Concrete accessories are utilised to fill these gaps and provide a break in the concrete, allowing it to expand and contract during the seasons, without cracking.

Ableflex expansion joints are ideal as a gap filler. Used as a seal, ableflex is flexible, lightweight and can be formed around curved objects. Known otherwise as stickyback.

 

Dowels provide a load transfer across a concrete joint to prevent or minimises the concrete slab from movements up and down when under load. They come in various shapes in sizes though are most commonly rould or square delending on where they are sitting within the slab. They may be galvanised in instances where water, salt and other contaminents are prevalant in and around the slab

Other people utilise key joints to provide a break in a concrete pour for slabs on ground. They are metal in structure and come in 3 metre and 6 metre lengths. They are often combined with ableflex and dowels to afford the slab additional movement and protection from heavy loads

 

Where do I buy all these concrete and steel accessories from?

 

At concrete broker we have many suppliers listed on our website from which to purchase concrete and steel accessories. Here are but a few :

 

Concrete Industry Supplies : https://www.concretebroker.com/ConstructionIndustrySupplies

Colourcrete Concreter's Warehouse : https://www.concretebroker.com/ColourcreteConcretersWarehousePtyLtd

Building and Construction Supplies : https://www.concretebroker.com/buildingconstructionsupplies

Reoplus : https://www.concretebroker.com/Reoplus

Urban Landscape Supplies : https://www.concretebroker.com/UrbanLandscapeSupplies

Alexandra & Yea Premix : https://www.concretebroker.com/alexandraandyeapremix

 

 

Related Articles : 

 

How much concrete, steel and accessories do I need? :https://www.concretebroker.com/Blog/View/160

How to lay a concrete slab : https://www.concretebroker.com/Blog/View/16

 

HAVE A CONCRETING PROJECT?

If you are ready to go with your next concreting project fill out a quote form here and at concretebroker we can put you in touch with a concreting expert near you. In fact we'll go further, we'll match you with 3 concreting experts.  Assess their quotations, read about their business online at concrete broker, and make an impartial, calculated decision.

 

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Tags: ableflex accessories bar chairs concrete accessories dowels form work keyjoint plastic reo accessories steel accessories


This article was written by timharrison0064@gmail.com all rights reserved. The views and opinions expressed in this article are those of the author(s) and do not necessarily reflect those of concretebroker.com